image: Volunteer (Djurica) with, from left to right, Stanisa Raspopovic, Francesco M. Petrini, Giacomo Valle. This material relates to a paper that appeared in the Oct. 2, 2019, issue of Science Translational Medicine , published by AAAS. The paper, by F.M. Petrini at ETH Zürich in Zürich, Switzerland; and colleagues was titled, "Enhancing functional abilities and cognitive integration of the lower limb prosthesis."
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Credit: Federica Barberi
一个研究小组为小腿截肢者创制了一种假肢,它含有高级神经刺激,令其能够再现常规假肢设计中缺乏的膝盖和脚部触觉。当在三个小腿截肢者中进行测试时,该神经假肢可增强活动性和敏捷性,防止跌倒,并能完成复杂作业。目前的下肢假体不能恢复小腿截肢者的触觉,相反,他们被迫依赖于接触所余肢体装置的有限的感觉反馈。结果,被截肢者面临诸如跌倒风险高和活动不良等严重问题;此外,感觉缺乏意味着假体通常被认为是一种外物而非身体的一部分。为克服这些障碍,Francesco Petrini和同事创制了一种腿神经假体,它通过刺激所余肢体的神经来实时模拟感觉反馈。他们的装置将市售的小腿假体与可提供压力和平衡感的膝部和鞋垫中的传感器相结合。他们在三名小腿经股截肢的患者中测试了该假体:与神经刺激关闭时相比,在有活跃神经刺激时,这些患者在进行诸如触摸识别等被动作业时的表现会更佳。这些受试者还可更快、更轻松地从事复杂作业——如爬楼梯和通过障碍道路。最后,通过客观测量和问卷调查,这些受试者在实地测试期间会表现出本体拥有感增加,对假体的精神关注则变少。
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Journal
Science Translational Medicine
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